I manage a "non Tesla certified" body shop and when it comes to bumpers, they're the same as any other car. We just did a bumper replacement on a 3 and currently have another 3 that needs a trunk, hinge and taillight in the shop. Shipping does take a long time and, as far as I know, there's no discount on Tesla parts to shops even, so they're expensive. As a collision shop I can buy any parts except structural and pre painted parts, which I wouldn't want to buy anyway. This does not guarantee a match at all and Tesla doesn't "make" their paint. The blue one we had had 2 variations for that paint code and neither were a dead match. I was able to tint the color and get it 98%.